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Friday 11 July 2025 9.00am EDT
During the last week Chandra completed the observing schedule as planned. A real-time procedure was executed on Jul 9 to uplink a flight software patch that updates the Aspect Camera Assembly (ACA) Processor Electronics Assembly to fix a longstanding issue known as the "PEA Wrong Box" bug. In addition, the patch includes a fix for the diagnostic "alternating" pixel mode, an update to the temperature plate scale to accommodate higher temperatures, and other minor enhancements. The net results of these changes should reduce acquisition failures by about 30%. The schedule of targets for the next week is shown below and includes observations of GS1826-238, which was accepted as a Director's Discretionary Time Target of Opportunity on Jun 30 and is coordinated with NuSTAR, and an observation of EP250702a, which was accepted as a Director's Discretionary Time Target of Opportunity on Jul 8. |
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BOSS1348 ACIS-I Jul 14
GS1826-238 ACIS-S/HETG
Radiation Belts
Abell370 ACIS-I Jul 15
PSRJ1852+0040 ACIS-S
ArLac (10 Obs) HRC-I
BOSS1348 ACIS-I Jul 16
PSRJ1813-1246 ACIS-I
ArLac (10 Obs) HRC-I
1E2215.7-0404/1E ACIS-I
ArLac HRC-S Jul 17
BOSS1348 ACIS-I
Radiation Belts
[JDW2009]G359.55+0. ACIS-I
SN2017eaw HRC-I Jul 18
MaNGA12622-12705 ACIS-S
GS1826-238 ACIS-S/HETG
NGVSJ123214.58+1203 ACIS-S
EP250702a ACIS-I
Abell370 ACIS-I Jul 19
NGC6537 HRC-I
Abell370 ACIS-I
Radiation Belts Jul 20
Abell370 ACIS-I
NGC6537 HRC-I------------------------------------------
All spacecraft subsystems continued to support nominal operations.
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Revised: July 08, 2022